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Civil Engineering :: Soil Mechanics and Foundation

Soil Mechanics and Foundation - section-1
  1. If the permeability of a soil is 0.8 mm/sec, the type of soil is

    2. A.

     gravel
    B.

     sand
    C.

     silt
    D.

     clay

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  2. A tri-axial shear test is preferred to direct shear test, because

    3. A.

     It can be performed under all three drainage conditions with complete control
    B.

     Precise measurement of pore pressure and change in volume during test, is not possible
    C.

     Stress distribution on the failure plane, is non uniform
    D.

     None of these

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  3. Contact pressure beneath a rigid footing resting on cohesive soil is

    4. A.

     less at edges compared to middle
    B.

     more at edges compared to middle
    C.

     uniform throughout
    D.

     none of the above

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  4. Select the incorrect statement. Effective angle of shearing resistance

    5. A.

     increases as the size of particles increases
    B.

     increases as the soil gradation im-proves
    C.

     is limited to a maximum value of 45°
    D.

     is rarely more than 30° for fine grained soil

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  5. Which of the following methods is best suited for determination of permeability of coarse-grained soils ?

    6. A.

     constant head method
    B.

     falling head method
    C.

     both the above
    D.

     none of the above

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  6. If the sand in-situ is in its densest state, then the relative density of sand is

    7. A.

     zero
    B.

     1
    C.

     between 0 and 1
    D.

     greater than 1

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  7. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is

    8. A.

     18.6 kN/m3
    B.

     20.0 kN/m3
    C.

     22.0 kN/m3
    D.

     23.2 kN/m3

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  8. Coefficient of earth pressure at rest is

    9. A.

     less than active earth pressure but greater than passive earth pressure
    B.

     greater than active earth pressure but less than passive earth pressure
    C.

     greater than both the active earth pressure and passive earth pressure
    D.

     less than both the active and passive earth pressures

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  9. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as

    10. A.

     negative
    B.

     zero
    C.

     non-plastic (NP)
    D.

     1

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  10. Voids ratio of a soil mass can

    11. A.

     never be greater than unity
    B.

     be zero
    C.

     take any value greater than zero
    D.

     take values between 0 and 1 only

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